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Permitted wear
FOR T0WING HITCHES AND DRAWBAR EYES
Automatic couplings
– bearing (turning knuckle)
– coupling pin – single hand pin
850 min. 6 mm
860/873 min. 7 mm
Insert pin bearing
86
36
Drawbar eyes
Gap at turning knuckle
between funnel and flange collar
under light load on the lower tab
in driving position: max. 3 mm
xx Diameter
Type Nominal Wear limit
dimension (mm) min. (mm)
840 38,6 ex0,1 36
850 30,6 ex0,1 28,6
860 38,6 ex0,1 36
873 30,6 ex0,1 28,6
xx Vertical clearance:
max. 2,5 mm
xx Clearance in the lower pin
guideway max. 2,5 mm:
Wear of the coupling pin
or of the bore max. 1,5 mm
xx Pin play in the bore max. 3 mm
(nominal dimension when
new 0,5 mm)
xx Wear of the pin max. 1,5 mm
xx Wear of the bore 1 mm
or vice versa
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ROCKINGER
Member of JOST-World
Non-automatic couplings
– bearing (turning knuckle)
– bore
33
Lift bearing
Gap at turning knuckle
between funnel and flange collar
under light load on the lower tab
in driving position: max. 3 mm
xx Diameter
Type Nominal Wear limit
dimension (mm) min. (mm)
274 30–31,5 28
800 30–31,5 28
810 30–31,5 28
Top and bottom
in drive position
max. 35 mm oval
xx Safety device:
no deformation
of the safety
components
xx Permissible
clearance:
max. 6 mm
xx Play in guideway in push/pull
direction max. 2,4 mm (nominal
dimension when new 0,4 mm at
an installation dimension 330 mm)
xx Wear of the groove in hitch holder
max. 1,2 mm
xx Wear in the guideway of the trailer
hitch 0,8 mm or vice versa
ISO DIN b2 c e3 max. (mm) min. (mm) min. (mm)
5692-2 11026 41,5 38 22
– 11043 41,5 311 22
8755 74054 41,5 28 22
8755 74054/2 (without bush) 44,0 28 24
1102 74053 52,5 41,5 23,5
5692-1 09678 52,5 27,5 27
1 2 3 New dimension in hump area 35 mm Dimension with bush Dimension without bush